Results 51 to 60 of about 124,038 (192)

Targeting qubit states using open-loop control [PDF]

, 2003
We present an open-loop (bang-bang) scheme which drives an open two-level quantum system to any target state, while maintaining quantum coherence throughout the process.
C D Helon, Fortunato M, Gardiner C W, Goetsch P, Khaneja N, Khaneja N, Khaneja N, Khaneja N, Knill E, Lidar D A, Mancini S, Nielsen M A, Palma G M, Protopopescu V, R Perez, Scully M S, Tombesi P, Tombesi P, Tombesi P, Tombesi P, V Protopopescu, Viola L, Viola L, Viola L, Vitali D, Walls D F, Weiss U, Wiseman H M, Wiseman H M, Wiseman H M, Zanardi P   +30 more
core   +2 more sources

Optimal superposition enhancement of a mixed state by stochastic diagonal superposition-free operations

Results in Physics, 2022
The resource theory of superposition is a generalization of coherence theory. A rigorous framework for quantifying superposition of linear independent states has been given by previous studies. In this paper, the optimal superposition enhancement of a mixed state is studied. Based on the l1 measure of superposition the optimal superposition enhancement
openaire   +2 more sources

Experiments testing macroscopic quantum superpositions must be slow [PDF]

, 2015
We consider a thought experiment where the preparation of a macroscopically massive or charged particle in a quantum superposition and the associated dynamics of a distant test particle apparently allow for superluminal communication.
De Palma, Giacomo, Giovannetti, Vittorio, Mari, Andrea   +2 more
core   +3 more sources

Continuity properties of the superposition operator [PDF]

Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics, 1989
AbstractVarious continuity conditions (in norm, in measure, weakly etc.) for the nonlinear superposition operatorF x(s) =f(s, x(s)) between spaces of measurable functions are established in terms of the generating functionf = f(s, u). In particular, a simple proof is given for the fact that, ifFis continuous in measure, thenfmay be replaced by a ...
Jürgen Appell, Pjotr P. Zabrejko
openaire   +1 more source

Uniform continuity and Brézis–Lieb-type splitting for superposition operators in Sobolev space

Advances in Nonlinear Analysis, 2018
Using concentration-compactness arguments, we prove a variant of the Brézis–Lieb-Lemma under weaker assumptions on the nonlinearity than known before.
Ackermann Nils
doaj   +1 more source

(1+1)-Dimensional SU(N) Static Sources in E and A Representations

, 1998
Here is presented a detailed work on the (1+1) dimensional SU(N) Yang-Mills theory with static sources. By studying the structure of the SU(N) group and of the Gauss' law we construct in the electric representation the appropriate wave functionals, which
J. Goldstone, J. Pachos, Jiannis Pachos, M. Bauer   +3 more
core   +3 more sources

Exciton dynamics and Quantumness of energy transfer in the Fenna-Matthews-Olson complex

, 2011
We present numerically exact results for the quantum coherent energy transfer in the Fenna-Matthews-Olson molecular aggregate under realistic physiological conditions, including vibrational fluctuations of the protein and the pigments for an ...
Braun, Daniel, Nalbach, Peter, Thorwart, Michael   +2 more
core   +3 more sources

Uniformly bounded superposition operators in the space of second bounded variation functions in the sense of Shiba

Publicaciones en Ciencias y Tecnología, 2016
In this paper we introduce the notion of “function of second bounded variation” in the sense of Shiba, and we show that if a superposition operator applies the space of all such functions on itself and it is uniformly bounded, then its generating ...
José Giménez, Nelson Merentes, Ebner Pineda, Luz Rodríguez   +3 more
doaj   +2 more sources

Existence of local minimizers for a critical problem involving a superposition operator of mixed fractional order

Bulletin of Mathematical Sciences
We prove the existence of local minimizers for a critical problem involving a superposition operator of mixed fractional order recently introduced in [S. Dipierro, K. Perera, C. Sportelli and E.
Giovanni Molica Bisci, Paolo Malanchini, Simone Secchi   +2 more
doaj   +1 more source

Noncommutative superpositions for nonlinear operators

Journal of Mathematical Analysis and Applications, 1970
AbstractLet T be an operator, T: D → E, T has a superposition with respect to an element e ϵ E iff ∃ a binary operation ∗ on D such that T(x ∗ y) = e when T(x) = T(y) = e.All operators having a superposition found until now have commutative superposition operations.
openaire   +1 more source